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  2. Electric organ (fish) - Wikipedia

    en.wikipedia.org/wiki/Electric_organ_(fish)

    Detailed descriptions of the powerful shocks that the electric catfish could give were written in ancient Egypt. [1]In the 1770s the electric organs of the torpedo ray and electric eel were the subject of Royal Society papers by John Walsh, [2] Hugh Williamson, [3] and John Hunter, who discovered what is now called Hunter's organ.

  3. Tree of life (biology) - Wikipedia

    en.wikipedia.org/wiki/Tree_of_life_(biology)

    Edward Hitchcock's fold-out paleontological chart in his 1840 Elementary Geology. Although tree-like diagrams have long been used to organise knowledge, and although branching diagrams known as claves ("keys") were omnipresent in eighteenth-century natural history, it appears that the earliest tree diagram of natural order was the 1801 "Arbre botanique" (Botanical Tree) of the French ...

  4. Morphology (biology) - Wikipedia

    en.wikipedia.org/wiki/Morphology_(biology)

    The etymology of the word "morphology" is from the Ancient Greek μορφή (morphḗ), meaning "form", and λόγος (lógos), meaning "word, study, research". [2] [3]While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist ...

  5. Medullary ray (botany) - Wikipedia

    en.wikipedia.org/wiki/Medullary_ray_(botany)

    A ray appears diagonally, from top left to bottom middle. Medullary rays , also known as vascular rays or pith rays , are cellular structures found in some species of wood . They appear as radial planar structures, perpendicular to the growth rings, which are visible to the naked eye.

  6. Crossword - Wikipedia

    en.wikipedia.org/wiki/Crossword

    A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one letter, while the black squares are used to ...

  7. Freedom Fighters: The Ray - Wikipedia

    en.wikipedia.org/wiki/Freedom_Fighters:_The_Ray

    John and Ray go back to the bar and Ray strikes up a conversation with the man, Jacob. As Ray and Jacob are walking down the street, they discover a lesbian couple being mugged. Jacob goes for help and Ray uses his powers to take the mugger down. While fighting a pair of bank robbers, Ray takes on "The Ray" mantle.

  8. Cytoskeleton - Wikipedia

    en.wikipedia.org/wiki/Cytoskeleton

    The latter formation is commonly referred to as a "9+2" arrangement, wherein each doublet is connected to another by the protein dynein. As both flagella and cilia are structural components of the cell, and are maintained by microtubules, they can be considered part of the cytoskeleton. There are two types of cilia: motile and non-motile cilia.

  9. Ray Palmer (Arrowverse) - Wikipedia

    en.wikipedia.org/wiki/Ray_Palmer_(Arrowverse)

    Ray, Ralph Dibny / Elongated Man and Iris West-Allen visit Ryan, who reveals he is a fan of Ray. The trio recruit him and tke him to the Waverider. The trio recruit him and tke him to the Waverider. An Anti-Monitor-possessed Lyla attacks them, and Nash Wells / Pariah sends the Paragons to the Vanishing Point, while Ray and the others are ...